40777010861 has 4 divisors (see below), whose sum is σ = 40862140800. Its totient is φ = 40691880924.

The previous prime is 40777010819. The next prime is 40777010899. The reversal of 40777010861 is 16801077704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40777010861 - 2¹⁸ = 40776748717 is a prime.

It is a super-2 number, since 2×40777010861² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40777010761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42564251 + ... + 42565208.

It is an arithmetic number, because the mean of its divisors is an integer number (10215535200).

Almost surely, 2^40777010861 is an apocalyptic number.

It is an amenable number.

40777010861 is a deficient number, since it is larger than the sum of its proper divisors (85129939).

40777010861 is an equidigital number, since it uses as much as digits as its factorization.

40777010861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85129938.

The product of its (nonzero) digits is 65856, while the sum is 41.

The spelling of 40777010861 in words is "forty billion, seven hundred seventy-seven million, ten thousand, eight hundred sixty-one".